#42B8D7#42B8D7

#42B8D7 is a light, moderate cyan. Relative luminance 0.403; OKLCH L 73.0% C 0.112 H 218.9°. Best body text is #000000 at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#42B8D7
RGB	rgb(66, 184, 215)
HSL	hsl(192, 65%, 55%)
HSV	hsv(192, 69%, 84%)
CMYK	cmyk(69.3%, 14.4%, 0%, 15.7%)
CIE-LAB	lab(69.71, -22.89, -25.16)
CIE-LCH	lch(69.71, 34.02, 227.70°)
OKLab	oklab(72.97% -0.0871 -0.0702)
OKLCH	oklch(72.97% 0.112 218.9)
XYZ	xyz(31.6479, 40.3419, 70.3956)
Luminance	0.4035 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8D7 #D76142

analogous

#42D7AB #42B8D7 #426ED7

triadic

#42B8D7 #D742B8 #B8D742

tetradic

#42B8D7 #AB42D7 #D76142 #6ED742

square

#42B8D7 #AB42D7 #D76142 #6ED742

split-complementary

#42B8D7 #D7426E #D7AB42

monochromatic

#1C6D83 #2698B5 #42B8D7 #75CBE2 #A7DEEC

Accessibility & contrast

On white

2.32

#42B8D7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.07

#42B8D7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D7

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8D7	#FFFFFF	#000000	##000000
##42B8D7	1.00	2.32	9.07	9.07
#FFFFFF	2.32	1.00	21.00	21.00
#000000	9.07	21.00	1.00	1.00
##000000	9.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B3D9

Deuteranopia (green-blind)

#90A4D7

Tritanopia (blue-blind)

#00C2C2

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b8d7;
/* rgb */ color: rgb(66, 184, 215);
/* oklch */ color: oklch(73.0% 0.112 218.9);

Tailwind

colors: {
  custom: {
    50: '#89cde3',
    500: '#42b8d7',
    950: '#000000',
  },
}

SCSS

$custom: #42b8d7;
$custom-light: #89cde3;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8d7",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 215
  },
  "hsl": {
    "h": 192.483,
    "s": 65.066,
    "l": 55.098
  },
  "oklch": {
    "l": 0.7297,
    "c": 0.11184,
    "h": 218.9
  },
  "luminance": 0.40346
}

Semantic roles & 50–950 ramp

primary

#42B8D7

secondary

#DAA89B

accent

#6340E8

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B8D7

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →